Filling tension device for looms.



No. 794,685. PATENTBD JULY 11, 1905.

7 A; L. SGARBORO. FILLING TENSION DEVICE FOR LOOMS.

APPLICATION FILED JAN. 21. 1905.

1935 5, ijafgfiaax .K dZaa 071/ cm 020,

UNITED STATES Patented July 11, 1905.

PATENT OFFICE.

ALLISON L. SCARBORO, OF CHARLOTTE, NORTH CAROLINA, ASSIGNOR TO DRAPERCOMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

FILLING TENSION DEVICE FOR LOOIVIS- SPECIFICATION forming part "ofLetters Patent No. 794,685, dated J uly' 11, 1905. Applica i n filedJanuary 21, 1905. Serial No. 2%,100-

To all whom, it may concern:

Be it known that I, ALLISON L. SoARBoRo, a citizen of the United States,and a resident of Charlotte, county of Mecklenburg, State of NorthCarolina, have invented an Implrovement in Filling Tension Devices forooms, of which the following description, in connection with theaccompanying drawings, is a specification, like characters on thedrawings representing like parts.

This invention has for its object the production of means to rendercertain and accurate the operation of the filling detector or fork of aloom when it engages properly-laid filling.

It is usual to provide the lay with a grate or grid to sustain thefilling at a number of adjacent points in order that the fork-tines byengaging the filling between such points on the forward detecting beatof the lay shall effect the tilting of the fork. At times this devicehas been assisted by putting more ten,- sion on the filling in theshuttle; but this latter arrangement is objectionable in practice, asthe increased tension causes the filling to pull too hard on the selvagewhen the shuttle is picked. More recently it has been proposed todispense with the grid and to clamp the filling adjacent the mouth oftheshuttlebox when the shuttle is boxed therein on the detecting beat ofthe lay, leaving the filling entirely without support in front of thefilling-detector. In actual practice it has been found that thisarrangement is uncertain in operation, apparently because the distancebetween. the selvage and the point at which the filling is clamped is sogreat that the tension of the filling varies, with consequent variationand uncertainty in the action of the filling-fork, and also because thefilling is at times a little slack at the instant it is clamped, causingirregular operation at times.

In my present invention I provide means to sustain the filling at anumber of adjacent points in front of the filling-fork, as by a grid,and maintain the filling in position when so sustained by clamping itbetween the shuttle when boxed and such sustaining points. I find thatby providing such sustaining means for the filling in front of the forkvariations in the tension of the clamped filling are completelycompensated for, and the fork W1ll. always be tilted with absolutecertainty when the filling is properly laid, even when there is someslackn'ess in the filling at the instant it is clamped.

The novel features of my invention will be fully described in thesubjoined specification, and particularly pointed out in the followingclaims.

Figure 1 is a partial plan view of a loom at the detecting side andpartly broken out with one embodiment of my invention applied thereto.Fig. 2 is a transverse sectional detail thereof on the line 2 2, Fig. 1,looking toward the left; and Fig. 3 is a sectional detail on the line 33, Fig. 1, across the guide for the fork-slide, omitting the latter andlooking toward the back of the loom.

The lay 1, transversely recessed at 2 opposite the filling detector orfork, the stand or guide 3 for the slide 4, on which at its rear end thefilling-fork 5 is pivotally mounted, the shipper S, and weft-hammer Wmay be and are all of well-known construction and operate in usualmanner, the lay being provided at each end with a shuttle-box, theshuttlebox B at the detecting side of the loom being shown in Fig. 1.

At the rear end of the recess 2 I provide means to sustain the fillingin front of the fork at a plurality of adjacent points conveniently by agrid 9, the bars thereof sustaining the filling, while the tines of thefork 5 engage the filling between its points of support on the detectingbeat of the lay.

In order to maintain the filling in proper position when so sustainedand to hold it taut without slip at the time the filling-fork operates,I clamp the filling between the shuttle when boxed and thesustainingpoints or grid. To this end the foot 6 of the guide 3 is shownas provided with an upright rib 7 parallel to the adjacent side of theguide (see Figs. 1 and 3) and forming therewith a housing having frontand rear ends 8 9, the latter being provided with a deep notch 10, Fig.3. A cover-plate 11 is adapted to close the top of the housing, saidcoverlate being bent down and provided with a ateral flange 12 to reston the foot 6 and secured thereto by screws 13. An elongated bar,preferably rectangular in cross-section for a portion of its length, asat 14, to slidably fit in the notch 10 and rounded at 15 within thehousing, is extended loosely through an opening in the front end 8 ofthe housing and threaded to receive a nut ,16 outside said end. (SeeFig. 1.) A collar or other enlargement 17 is secured to the bar withinthe housing, and between the front end 8 of the latter and said collar aspring 8X is coiled around the part 15' of the slide-bar, the springtending to retain the bar in the position shown in Figs. 1 and 2. Thecoverplate 11, partly broken out in Fig. 1, retains the bar in positionwithin the housing, while permitting longitudinal movement therein, aswill be manifest. At its rear end the bar is enlarged and downturned toform a head 18, bifurcated at 19 to receive an upright strip 20 ofrubber, leather, felt, or other suitable yielding and non-metallicmaterial and so located that when the lay beats up this clamping member20 will impinge upon the back wall 21 of the shuttle-box B be tween itsmouth and the grid 9 prior to the instant at which the detector or fork5 will engage the filling on the detecting beat.

The filling-detector in the structure herein shown operates on alternateforward beats of the lay, as is common.

When the shuttle S is in the box B, the filling t, Fig. 1, when properlylaid will extend from the selvage of the cloth to the delivery-eye ofthe shuttle, and as the lay beats up on the detecting beat the fillingwill be sustained by the grid 9 at several adjacent points in front ofthe fork 5, and the filling will also be caught between the cushion 20of the head 18 on the slidable member 14 and the back wall of theshuttle-box and clamped. This not only serves normally to hold thefilling taut between the clamping-point and the edge of the cloth,preventing it from slipping, but it also maintains it in position to beproperly sustained by the grid, so that sufficient resistance ispresented to tilt the fork or detector, the spring a yielding as theforward movement of the lay moves the slidable member outward toward thefront of the loom. The nut 16 acts as a stop to limit rearward movementof the slidable member, and by setting up the nut or letting it off theposition of the clamping-head can be adjusted forward or backward.

The grid in a loom ordinarily sustains the filling immediately in frontof the detector,

so that the filling will engage and tilt such de- 6 5 tension of thisportion of the filling, the sus- I taining action of the gridcompensates therefor and insures the proper fork action.

Thus by the cooperation of the clamping means and the sustaining actionof the grid the practical objections arising from the use of either byitself are completely obviated, each acting to complement the operationof the other and compensate for variations in the action thereof,resulting in an always and absolutely reliable yet simple apparatus toeffect with perfect certainty the proper actlon of the filling-detector.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a loom, a lay provided with a shuttle-box, a grid near the mouthof the shuttlebox, a filling-detector movable across the raceway of thelay in front of the grid as the lay beats up, and means to clamp thefilling between the grid and the shuttle when the latter is boxed, thegrid sustaining the filling in front of the detector while the clampingmeans maintains the filling taut when engaged by the detector, wherebythe action of the latter is rendered certain.

2. In a loom, a lay provided with a shuttle-box, a grid near the mouthof the shuttlebox, a filling-detector to detect presence or absence ofthe filling in front of the grid when the shuttle is in the shuttle-box,and means supported independently of the lay to clamp the fillingbetween the shuttle and the grid on the detecting beat of the lay, thegrid sustaining the filling and insuring certainty in the action of thedetector while the clamping means prevents slip of the filling andmaintains it properly taut between the shuttle and the cloth.

3. In a loom, a lay provided with a shuttle-box, a grid near the mouthof the shuttlebox, a shuttle, afilling-detector, and yield ingly-mountedmeans independent of the lay and the shuttle to act upon the fillingbetween the shuttle and the grid and maintain the filling taut acrossthe grid to be engaged by the filling-detector on the detecting beat ofthe lay.

4. In a loom, a lay provided with a shuttle-box, a grid near the mouthof the shuttle- IIS box, a shuttle, a filling-detector, and yield- Intestimony whereof I have signed my ingly-mounted means to 'cocperatewith the name to this specification in the presence of back wall of theshuttle-box between the lattwo subscribing witnesses.

ALLISON L. SCARBORO.

ter and the grid and clamp the filling in posi- 5 tion to be sustainedby the grid and thereby Witnesses:

presented tent to the filling-detector on the M. OGLESBY, detecting beatof the lay. J. H. EMERY.

